\HPage{button}...\EndHPage{}
[example]
The \ExitHPage{...} command may be employed within the content to create exit buttons.
[example]
\CutAt{at-unit,until-unit-1,until-unit-2,...}
\at-unit to place their units in separate hypertext pages. The
pages are to terminate upon encountering any of the commands in the list \at-unit, \until-unit-1,
\until-unit-2,...
[example]
Within the CutAt instruction, the starred commands of LaTeX should be referenced with the prefix `like'
instead of the postfix of `*'.
A plus character `+' before the leading parameter requests buttons that link to the hypertext pages (e.g.,
`\CutAt{+section}').
The `next' option of \Preamble, and the outcome of the `\Configure{crosslinks}...' command, apply also
to the links created for the current pages.